Parts for your 2025 Mazda 3-Gas struts

2025 Mazda 3 gas struts — what they do and when to replace them

Based on Mazda’s BP-series Mazda3 Owner’s Manual (MY2024–MY2025) and Mazda Genuine Parts Catalogue, the 2025 Mazda 3 Hatch uses two gas-pressurised liftgate stays (gas struts) for the tailgate. The 2025 Mazda 3 Sedan’s boot is supported by torsion bars, and the bonnet on both body styles is held up with a prop rod rather than gas struts. So, gas struts are relevant to the Hatch’s tailgate only.

On the 2025 Mazda 3 Hatch, those gas struts do the heavy lifting—literally. They counterbalance the tailgate’s weight so it glides up smoothly and stays put without needing a hand. They also slow the final part of the lift and close to feel tidy and controlled, which is why a worn strut makes the tailgate feel heavy, jerky, or keen to drop on a gusty day.

Servicing is straightforward and mostly about inspection. Wipe the exposed chrome shafts with a clean, damp cloth to remove grit, and don’t lubricate the shafts with oil or grease—contamination can damage the seals. Avoid using clamps or vice-grips on the strut body or shaft. If a strut is weak, replace both sides together to keep the lift balanced and stop twisting the hinges.

• Common signs they’re tired: the gate won’t stay up, rises slowly (especially in cold weather), drops the last third of travel, feels uneven side-to-side, or shows misting/oil around the seals with a faint hiss.
• Replacement tips: support the tailgate safely, pop off the retaining clips, swap the struts one side at a time, and ensure sockets seat fully on the ball studs. Tighten mounts to OEM spec and check alignment for smooth, hands-off holding at full open.
• Typical lifespan: 5–8 years in Aussie and Kiwi conditions, sooner if the car lives coastal or the gate is frequently cycled with added weight (accessories, snow, or bikes resting on it).

Owners can expect a big improvement from fresh struts—consistent lift, no shoulder strain, and no risk of the gate creeping down. If the vehicle is a 2025 Mazda 3 Sedan, there’s no tailgate gas strut to service, and a weak boot action points to the torsion bar setup rather than a strut. For bonnets on both variants, the prop rod design means there’s no gas strut to maintain.

Popular questions

Does the 2025 Mazda 3 Sedan have gas struts?
No. Technical references for the BP-series show the Sedan boot uses torsion bars, and the bonnet uses a prop rod. Only the Hatch has gas struts, and they’re fitted to the tailgate.

How often should Mazda 3 gas struts be replaced?
There’s no fixed interval—replace when they no longer hold the tailgate securely or show oil weep, usually around 5–8 years in AU/NZ. Always replace in pairs to keep lift even.

Can 2025 Mazda 3 gas struts be re-gassed?
Most OEM Mazda liftgate struts are sealed units and aren’t serviceable. If they’re weak, the correct fix is replacement with new units matched to the vehicle’s spec.